*{ margin: 0px;padding: 0;}
.logo{
    height: 75px;
    background: #19bebe url("../images/logo.png") no-repeat center center;
}
.container{
    width: 1000px;
    margin-left: auto;
    margin-right: auto;
}
body{
    background: #f5f5f5;
    color:#5f5f5f;
    font-size: 14px;
}
.row::after{
    display: block;
    content: "";
    clear: both;
}
.ta-c{
    text-align: center;
}
div{
    box-sizing: border-box;
}
.center{
    margin-left: auto;
    margin-right: auto;
}
.top{
    background: #f0f0f0;
    margin-bottom: 23px;    
    line-height: 40px;
}
.foot{
    background: #505050;
    color: #dbdbdb;
    margin-top: 60px;    
}
ul{
    list-style: none;
}
a{
    text-decoration: none;
    color: #5f5f5f;
}
.address{
    width: 180px;
    color: #636363;
    position: relative;
    float: left;
}
.address>img{
    position: absolute;
    top: 11px;
    left: 30px;
}
.nav{
    float: left;
    width: 700px;
}
.nav>ul{
    display: flex;
    justify-content: center;
}
.nav li{
    width: 95px;
    color: #505050;
}
.personal{
    width: 75px;
    float: right;
    color: #fdac23;
    position: relative;
}
.personal img{
    position: absolute;
    top: 11px;
    left: -22px;;
}
.sidebar-b{
    width: 810px; 
}     
.sidebar-a{
    width: 180px;
    margin-right: 10px;  
    padding-top:25px; 
}
.sidebar-a ,.sidebar-b{
    height: 840px;
    border: 1px solid #eaeaea;
    background: #f0f0f0;
    float: left; 
}
.sidebar-a>ul{ 
    margin-top: 25px;
    
}
.sidebar-a li:hover{
    border: 1px solid #e0e0e0;
    border-left: 3px solid #19bebe;
}
.sidebar-a li{   
    padding-left:40px;
    width: 136px;
    line-height: 30px;
    border: 1px solid #f0f0f0;
    border-left: 3px solid #f0f0f0;
}
.sidebar-a li:first-child{
    color: #505050;
    font-size: 16px;     
    position: relative ;
}
.sidebar-a img{
    display: block;
    position: absolute;
    top: 9px;
    left: 20px;
}
.sidebar-a>h{
    color: #505050;
    font-size: 16px;     
    margin-left:40px;
}
.footer-logo{
    width: 355px;
    padding: 25px 15px;
    float: left;
}
.footer-logo img{
    width: 190px;
    height: 90px;
}
.aboutus{
    float: left;
    padding: 80px 0 0 60px ;
}
.aboutus ul{
    margin-left: 100px;
    float: left;
}
.copyright{
    border-top: 1px solid#ccc;
    line-height: 47px;
    padding: 15px;
}
.copyright p:first-child{
    float: right;
}
iframe{
    width: 100%;
    height: 100%;
}